厚板控冷过程中温度变化模拟及冷后组织与性能分析

Temperature Variation Simulation of Controlled Cooling Heavy Plate and Analysis of Its Microstructures and Mechanical Properties After Cooling

建立了一个预测轧后控制冷却过程中钢板内部温度变化的数学模型,并将此模型应用于特定的厚板轧后控制冷却生产线,该控冷生产线采用管层流冷却方式。本模型考虑了辐射、自然对流、强制对流及稳态膜沸腾对冷却过程中钢板内部温度变化的影响,通过比较实测温度和计算温度确定了模型的准确性。对控冷后钢板厚度方向不同位置的组织和性能进行了详细分析。

A numerical model was developed and applied to a specific runout table to predict the temperature variation in a heavy plate cooled by an array of laminar flow water bars. Radiation, natural convection, forced convection and stable film boiling are considered in the model. The model is validated by comparing the predicted temperatures with the measurements obtained on the runout table of a steel mill. In addition, the mierostructures and mechanical properties at different locations through the thickness of the heavy plate are investigated systematically.